package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdChannelMapper;
import com.heima.admin.service.AdChannelService;
import com.heima.model.admin.dtos.ChannelDTO;
import com.heima.model.admin.pojos.AdChannel;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;

@Service
public class AdChannelServiceImpl extends ServiceImpl<AdChannelMapper, AdChannel> implements AdChannelService {

    /**
     * 查询当前页数据
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findByNameAndPage(ChannelDTO dto) {
            //1:参数检查
        if(dto==null){
            return  ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检查
        dto.checkParam();
        //按名称模糊分页查询
        Page page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<AdChannel> wrappers = Wrappers.<AdChannel>lambdaQuery();
        //判断频道列表名不为空
        if(StringUtils.isNotBlank(dto.getName())){
            wrappers.like(AdChannel::getName,dto.getName());
        }
        //添加排序
        wrappers.orderByAsc(AdChannel::getOrd);
        IPage result = this.page(page, wrappers);
        //结果封装
        PageResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), result.getTotal());
       responseResult.setData(result.getRecords());
        return responseResult;
    }

    /**
     * 新增
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult insert(AdChannel adChannel) {
        //校验参数
        if(adChannel==null ||StringUtils.isBlank(adChannel.getName())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"参数不能为空");
        }
        //2:判断该频道是否存在
        int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                        .eq(AdChannel::getName,adChannel.getName()));
        if(count>0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已经存在");
        }
        //创建新增时间
        adChannel.setCreatedTime(new Date());
        //执行新增
       save(adChannel);
       // 返回结果
        return ResponseResult.okResult();
    }

    /**
     * 根据ID删除指定频道
     * @param id
     * @return
     */
    @Override
    public ResponseResult deleteById(Integer id) {
        //参数检查
        if(id==null){
            ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"id不能为空");
        }
        //根据id查询频道是否存在  和 是否有效
        AdChannel channel = getById(id);
        if(channel==null){
            ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道不存在");
        }
        //启用状态下不能删除
        if(channel.getStatus()){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        //删除频道
       removeById(id);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 更新频道及频道状态
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult update(AdChannel adChannel) {
        if(adChannel==null || adChannel.getId()==null){
            return  ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"参数不能为空");
        }
        //执行修改
        AdChannel channel = getById(adChannel.getId());
                if(channel==null){
                    return  ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
                }
                //校验频道名称的唯一性
        if(StringUtils.isNotBlank(adChannel.getName())&&
        !adChannel.getName().equals(channel.getName())){
            int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                    .eq(AdChannel::getName, channel.getName()));
            if(count>0){
                //执行修改
                updateById(adChannel);
            }
        }
        return ResponseResult.okResult();
    }


}
